论文标题
外来核超越质子滴管线的两种质子放射性
Two-proton radioactivity of exotic nuclei beyond proton drip-line
论文作者
论文摘要
To search for new candidates of the true and simultaneous two-proton ($2p$) radioactivity, the $2p$ decay energies (\textit{Q}$_{2p}$) are extracted by the Weizsäcker-Skyrme-4 (WS4) model, the finite-range droplet model (FRDM), the Kourra-Tachibaba-Uno-Yamada （KTUY）模型和具有BSK29 Skyrme相互作用（HFB29）的Hartree-Fock-Bogoliubov平均场模型。然后，通过输入\ textit {q} $ _ {2p} $ values的四种类型，在广义液滴模型（GLDM）中计算出$ 2P $放射性的半衰期。通过能量和半衰期的约束，发现可能的$ 2p $衰减候选者是\ textit {z} $ <$ 50或\ textit {z} $ \ leq 50 $ 50 $的质子滴落线的核。在\ textit {z} = 50的区域中，仅使用HFB29质量模型预测$ 2P $ - 派遣候选者。最后，讨论了\ textIt {n} = \ textit {z} = 50壳闭合之间的真实$ 2P $放射性与$α$ - 订单之间的竞争。结果表明，$^{101} $ te，$^{111} $ ba和$^{114} $ ce更喜欢$ 2P $放射性和$^{107} $ xe和$ xe and $^{116} $ cE的主要衰减模式。
To search for new candidates of the true and simultaneous two-proton ($2p$) radioactivity, the $2p$ decay energies (\textit{Q}$_{2p}$) are extracted by the Weizsäcker-Skyrme-4 (WS4) model, the finite-range droplet model (FRDM), the Kourra-Tachibaba-Uno-Yamada (KTUY) model and the Hartree-Fock-Bogoliubov mean-field model with the BSk29 Skyrme interaction (HFB29). Then, the $2p$ radioactivity half-lives are calculated within the generalized liquid drop model (GLDM) by inputting the four types of \textit{Q}$_{2p}$ values. By the energy and half-life constraints, it is found that the probable $2p$ decay candidates are the nuclei beyond the proton-drip line in the region of \textit{Z} $<$50 or \textit{Z}$\leq 50$ based on each nuclear mass model. In the region beyond \textit{Z}=50, the $2p$-decaying candidates are predicted only using the HFB29 mass model. Finally, the competition between the true $2p$ radioactivity and $α$-decay for the nuclei above the \textit{N}=\textit{Z}=50 shell closures is discussed. It is shown that $^{101}$Te, $^{111}$Ba and $^{114}$Ce prefer to $2p$ radioactivity and the dominant decay mode of $^{107}$Xe and $^{116}$Ce is $α$-decay.
